OSG seems to be the one to get but what about the NISMO? At least initially the chosen LSD will be fitted as supplied, no tuning, so that is relevant. Experiences?

 

Since we built the SCCA Touring 1/2/3 Z back in '08, I've used both the NISMO and Wavetrac LSDs. I prefer the NISMO as it needs to external cooler for sprint races and is extremely durable. Use the synthetic Motul diff lubricant on a annual basis and off you go!